Question

我有两个看起来像这样的对象数组：

MeetingRoomSuggestions：

init(suggestionReason: String, organizerAvailability: String,
startTime: String, endTime: String, dStart: Date, availability: String,
emailAddress: String, displayName: String, roomEmail: String,
occupancy: Int, building: String)

和Bookings：

init(startTime: String, endTime: String, dStart: Date, organizer :
String, location : String, subject : String)

如果MeetingRoomSuggestion数组中存在dStart属性，我希望能够从我的数组中过滤/排除Bookings个对象。

我的代码：

  let filteredArr = meetingRoomSuggestions.filter { meeting in
        return bookingArray!.contains(where: { booking in
            return booking.dStart == meeting.dStart
        })
    }

我也尝试过滤起始字符串-两者相同。当我在过滤之前打印出两个数组时，您可以清楚地看到存在与同一dStart相同的预订。如何排除这个？

使用代码过滤并打印出来后：

print("meetings:")
        for meeting in self.meetingRoomSuggestions {
            print(meeting.roomEmail)
            print(meeting.dStart)
            print(meeting.startTime)
        }
        print()
        print("bookings:")
        for booking in self.bookingArray! {
            print(booking.location)
            print(booking.dStart!)
            print(booking.start)
        }            

        print("filtered array: ", filteredArr)

        for items in filteredArr {
            print("email: ", items.roomEmail)
            print("dstart: ", items.dStart)
        }

返回：

    meetings:
FirstFloorTestMeetingRoom1@qubbook.onmicrosoft.com
2019-02-20 15:00:00 +0000
2019-02-20T15:00:00.0000000
GroundFloorTestMeetingRoom1@qubbook.onmicrosoft.com
2019-02-20 15:00:00 +0000
2019-02-20T15:00:00.0000000

bookings:
FirstFloorTestMeetingRoom1@qubbook.onmicrosoft.com
2019-02-20 15:00:00 +0000
2019-02-20T15:00:00.0000000
gfprojectroom1@qubbook.onmicrosoft.com
2019-02-21 10:00:00 +0000
2019-02-21T10:00:00.0000000
gfprojectroom1@qubbook.onmicrosoft.com
2019-02-21 16:00:00 +0000
2019-02-21T16:00:00.0000000

filtered array:  [QUBook.MeetingSuggestion, QUBook.MeetingSuggestion]
email:  FirstFloorTestMeetingRoom1@qubbook.onmicrosoft.com
dstart:  2019-02-20 15:00:00 +0000
email:  GroundFloorTestMeetingRoom1@qubbook.onmicrosoft.com
dstart:  2019-02-20 15:00:00 +0000

由于某种原因，过滤后的数组与原始meetingRoomSuggestions数组相同-它不会过滤出具有相同dStart的对象。我怀疑过滤器有问题吗？我以前能够通过将对象与字符串数组等进行比较来过滤对象数组，但不是这样。

Answer 1

您在这里使用某种反向逻辑。您应该做的是这样：

let filteredArr = meetingRoomSuggestions.filter { meeting in
    return !bookingArray.contains(where: { booking in
        return booking.dStart == meeting.dStart
    })
}

简而言之：filter个会议，使do not的{{1}}值等于dStart中任何对象的dStart值的会议。

如果属性值存在于另一个对象数组中，则过滤对象数组

1 个答案: